/*
 *
 * 
 */
//basado en el ejemplo de: http://www.youtube.com/watch?v=8IC3W4PUvmc
//creado por ElizabethDMS
package hello;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

/**
 * @author Owner
 */
public class sums extends MIDlet implements CommandListener, ItemCommandListener {
    
    private boolean midletPaused = false;

//<editor-fold defaultstate="collapsed" desc=" Generated Fields ">//GEN-BEGIN:|fields|0|
    private Form form;
    private TextField num1;
    private TextField num2;
    private StringItem res;
    private Command SUMAR;
    private Command backCommand;
//</editor-fold>//GEN-END:|fields|0|
    /**
     * The sums constructor.
     */
    public sums() {
    }

    public void suma2(){
        if(num1.getString()!=" "||num2.getString()!=" "){
            double nro1 = Double.parseDouble(num1.getString());
            double nro2 = Double.parseDouble(num2.getString());
            double suma = nro1+nro2;
            String sum= String.valueOf(suma);
            res.setText(sum);
        } else{
            res.setText("hay algo vacio");
        }
    }
//<editor-fold defaultstate="collapsed" desc=" Generated Methods ">//GEN-BEGIN:|methods|0|
//</editor-fold>//GEN-END:|methods|0|
//<editor-fold defaultstate="collapsed" desc=" Generated Method: initialize ">//GEN-BEGIN:|0-initialize|0|0-preInitialize

    /**
     * Initializes the application. It is called only once when the MIDlet is
     * started. The method is called before the
     * <code>startMIDlet</code> method.
     */
    private void initialize() {//GEN-END:|0-initialize|0|0-preInitialize
        // write pre-initialize user code here
//GEN-LINE:|0-initialize|1|0-postInitialize
        // write post-initialize user code here
    }//GEN-BEGIN:|0-initialize|2|
//</editor-fold>//GEN-END:|0-initialize|2|

//<editor-fold defaultstate="collapsed" desc=" Generated Method: startMIDlet ">//GEN-BEGIN:|3-startMIDlet|0|3-preAction
    /**
     * Performs an action assigned to the Mobile Device - MIDlet Started point.
     */
    public void startMIDlet() {//GEN-END:|3-startMIDlet|0|3-preAction
        // write pre-action user code here
        switchDisplayable(null, getForm());//GEN-LINE:|3-startMIDlet|1|3-postAction
        // write post-action user code here
    }//GEN-BEGIN:|3-startMIDlet|2|
//</editor-fold>//GEN-END:|3-startMIDlet|2|

//<editor-fold defaultstate="collapsed" desc=" Generated Method: resumeMIDlet ">//GEN-BEGIN:|4-resumeMIDlet|0|4-preAction
    /**
     * Performs an action assigned to the Mobile Device - MIDlet Resumed point.
     */
    public void resumeMIDlet() {//GEN-END:|4-resumeMIDlet|0|4-preAction
        // write pre-action user code here
//GEN-LINE:|4-resumeMIDlet|1|4-postAction
        // write post-action user code here
    }//GEN-BEGIN:|4-resumeMIDlet|2|
//</editor-fold>//GEN-END:|4-resumeMIDlet|2|

//<editor-fold defaultstate="collapsed" desc=" Generated Method: switchDisplayable ">//GEN-BEGIN:|5-switchDisplayable|0|5-preSwitch
    /**
     * Switches a current displayable in a display. The
     * <code>display</code> instance is taken from
     * <code>getDisplay</code> method. This method is used by all actions in the
     * design for switching displayable.
     *
     * @param alert the Alert which is temporarily set to the display;
     * if <code>null</code>, then <code>nextDisplayable</code> is set
     * immediately
     * @param nextDisplayable the Displayable to be set
     */
    public void switchDisplayable(Alert alert, Displayable nextDisplayable) {//GEN-END:|5-switchDisplayable|0|5-preSwitch
        // write pre-switch user code here
        Display display = getDisplay();//GEN-BEGIN:|5-switchDisplayable|1|5-postSwitch
        if (alert == null) {
            display.setCurrent(nextDisplayable);
        } else {
            display.setCurrent(alert, nextDisplayable);
        }//GEN-END:|5-switchDisplayable|1|5-postSwitch
        // write post-switch user code here
    }//GEN-BEGIN:|5-switchDisplayable|2|
//</editor-fold>//GEN-END:|5-switchDisplayable|2|

//<editor-fold defaultstate="collapsed" desc=" Generated Method: commandAction for Displayables ">//GEN-BEGIN:|7-commandAction|0|7-preCommandAction
    /**
     * Called by a system to indicated that a command has been invoked on a
     * particular displayable.
     *
     * @param command the Command that was invoked
     * @param displayable the Displayable where the command was invoked
     */
    public void commandAction(Command command, Displayable displayable) {//GEN-END:|7-commandAction|0|7-preCommandAction
        // write pre-action user code here
        if (displayable == form) {//GEN-BEGIN:|7-commandAction|1|16-preAction
            if (command == SUMAR) {//GEN-END:|7-commandAction|1|16-preAction
                suma2();
                // write pre-action user code heres
//GEN-LINE:|7-commandAction|2|16-postAction
                // write post-action user code here
            }//GEN-BEGIN:|7-commandAction|3|7-postCommandAction
        }//GEN-END:|7-commandAction|3|7-postCommandAction
        // write post-action user code here
    }//GEN-BEGIN:|7-commandAction|4|
//</editor-fold>//GEN-END:|7-commandAction|4|

//<editor-fold defaultstate="collapsed" desc=" Generated Method: commandAction for Items ">//GEN-BEGIN:|8-itemCommandAction|0|8-preItemCommandAction
    /**
     * Called by a system to indicated that a command has been invoked on a
     * particular item.
     *
     * @param command the Command that was invoked
     * @param displayable the Item where the command was invoked
     */
    public void commandAction(Command command, Item item) {//GEN-END:|8-itemCommandAction|0|8-preItemCommandAction
        // write pre-action user code here
        if (item == res) {//GEN-BEGIN:|8-itemCommandAction|1|22-preAction
            if (command == backCommand) {//GEN-END:|8-itemCommandAction|1|22-preAction
                // write pre-action user code here
                exitMIDlet();//GEN-LINE:|8-itemCommandAction|2|22-postAction
                // write post-action user code here
            }//GEN-BEGIN:|8-itemCommandAction|3|8-postItemCommandAction
        }//GEN-END:|8-itemCommandAction|3|8-postItemCommandAction
        // write post-action user code here
    }//GEN-BEGIN:|8-itemCommandAction|4|
//</editor-fold>//GEN-END:|8-itemCommandAction|4|

//<editor-fold defaultstate="collapsed" desc=" Generated Getter: form ">//GEN-BEGIN:|14-getter|0|14-preInit
    /**
     * Returns an initialized instance of form component.
     *
     * @return the initialized component instance
     */
    public Form getForm() {
        if (form == null) {//GEN-END:|14-getter|0|14-preInit
            // write pre-init user code here
            form = new Form("suma de 2 numeros", new Item[]{getNum1(), getNum2(), getRes()});//GEN-BEGIN:|14-getter|1|14-postInit
            form.addCommand(getSUMAR());
            form.setCommandListener(this);//GEN-END:|14-getter|1|14-postInit
            // write post-init user code here
        }//GEN-BEGIN:|14-getter|2|
        return form;
    }
//</editor-fold>//GEN-END:|14-getter|2|

//<editor-fold defaultstate="collapsed" desc=" Generated Getter: num1 ">//GEN-BEGIN:|18-getter|0|18-preInit
    /**
     * Returns an initialized instance of num1 component.
     *
     * @return the initialized component instance
     */
    public TextField getNum1() {
        if (num1 == null) {//GEN-END:|18-getter|0|18-preInit
            // write pre-init user code here
            num1 = new TextField("primer numero", "0", 32, TextField.DECIMAL);//GEN-LINE:|18-getter|1|18-postInit
            // write post-init user code here
        }//GEN-BEGIN:|18-getter|2|
        return num1;
    }
//</editor-fold>//GEN-END:|18-getter|2|

//<editor-fold defaultstate="collapsed" desc=" Generated Getter: num2 ">//GEN-BEGIN:|19-getter|0|19-preInit
    /**
     * Returns an initialized instance of num2 component.
     *
     * @return the initialized component instance
     */
    public TextField getNum2() {
        if (num2 == null) {//GEN-END:|19-getter|0|19-preInit
            // write pre-init user code here
            num2 = new TextField("segundo numero", "0", 32, TextField.DECIMAL);//GEN-LINE:|19-getter|1|19-postInit
            // write post-init user code here
        }//GEN-BEGIN:|19-getter|2|
        return num2;
    }
//</editor-fold>//GEN-END:|19-getter|2|

//<editor-fold defaultstate="collapsed" desc=" Generated Getter: res ">//GEN-BEGIN:|20-getter|0|20-preInit
    /**
     * Returns an initialized instance of res component.
     *
     * @return the initialized component instance
     */
    public StringItem getRes() {
        if (res == null) {//GEN-END:|20-getter|0|20-preInit
            // write pre-init user code here
            res = new StringItem("Resultado:", " ", Item.HYPERLINK);//GEN-BEGIN:|20-getter|1|20-postInit
            res.addCommand(getBackCommand());
            res.setItemCommandListener(this);//GEN-END:|20-getter|1|20-postInit
            // write post-init user code here
        }//GEN-BEGIN:|20-getter|2|
        return res;
    }
//</editor-fold>//GEN-END:|20-getter|2|

//<editor-fold defaultstate="collapsed" desc=" Generated Getter: SUMAR ">//GEN-BEGIN:|15-getter|0|15-preInit
    /**
     * Returns an initialized instance of SUMAR component.
     *
     * @return the initialized component instance
     */
    public Command getSUMAR() {
        if (SUMAR == null) {//GEN-END:|15-getter|0|15-preInit
            // write pre-init user code here
            SUMAR = new Command("sumar", Command.ITEM, 0);//GEN-LINE:|15-getter|1|15-postInit
            // write post-init user code here
        }//GEN-BEGIN:|15-getter|2|
        return SUMAR;
    }
//</editor-fold>//GEN-END:|15-getter|2|

//<editor-fold defaultstate="collapsed" desc=" Generated Getter: backCommand ">//GEN-BEGIN:|21-getter|0|21-preInit
    /**
     * Returns an initialized instance of backCommand component.
     *
     * @return the initialized component instance
     */
    public Command getBackCommand() {
        if (backCommand == null) {//GEN-END:|21-getter|0|21-preInit
            // write pre-init user code here
            backCommand = new Command("SALIR", Command.BACK, 0);//GEN-LINE:|21-getter|1|21-postInit
            // write post-init user code here
        }//GEN-BEGIN:|21-getter|2|
        return backCommand;
    }
//</editor-fold>//GEN-END:|21-getter|2|

    /**
     * Returns a display instance.
     *
     * @return the display instance.
     */
    public Display getDisplay() {
        return Display.getDisplay(this);
    }

    /**
     * Exits MIDlet.
     */
    public void exitMIDlet() {
        switchDisplayable(null, null);
        destroyApp(true);
        notifyDestroyed();
    }

    /**
     * Called when MIDlet is started. Checks whether the MIDlet have been
     * already started and initialize/starts or resumes the MIDlet.
     */
    public void startApp() {
        if (midletPaused) {
            resumeMIDlet();
        } else {
            initialize();
            startMIDlet();
        }
        midletPaused = false;
    }

    /**
     * Called when MIDlet is paused.
     */
    public void pauseApp() {
        midletPaused = true;
    }

    /**
     * Called to signal the MIDlet to terminate.
     *
     * @param unconditional if true, then the MIDlet has to be unconditionally
     * terminated and all resources has to be released.
     */
    public void destroyApp(boolean unconditional) {
    }
}
